National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

87°F

31°C

Humidity 51%
Wind Speed SW 10 mph
Barometer 30.02 in (1016.0 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 20 Jun 11:53 am CDT
Extended Forecast for

2 Miles WSW Fairview Heights IL

Extreme Heat Watch June 21, 12:00pm until June 24, 09:00pm
Click here for hazard details and duration
Extreme Heat Watch

  • This Afternoon

    This Afternoon: Partly sunny early, then becoming sunny, with a high near 91. South wind 9 to 11 mph.

    High: 91 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Clear, with a low around 76. South wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 76 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 96. Heat index values as high as 107. Southwest wind 9 to 16 mph, with gusts as high as 25 mph.

    High: 96 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74. South wind 7 to 11 mph, with gusts as high as 21 mph.

    Low: 74 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 97. South wind 6 to 10 mph.

    High: 97 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 77.

    Low: 77 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 77.

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of showers before 1pm. Sunny, with a high near 95.

    High: 95 °F

    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Partly sunny early, then becoming sunny, with a high near 91. South wind 9 to 11 mph.
Tonight
Clear, with a low around 76. South wind 8 to 11 mph, with gusts as high as 21 mph.
Saturday
Sunny, with a high near 96. Heat index values as high as 107. Southwest wind 9 to 16 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 74. South wind 7 to 11 mph, with gusts as high as 21 mph.
Sunday
Sunny and hot, with a high near 97. South wind 6 to 10 mph.
Sunday Night
Mostly clear, with a low around 77.
Monday
Sunny, with a high near 96.
Monday Night
Mostly clear, with a low around 77.
Tuesday
A 20 percent chance of showers before 1pm. Sunny, with a high near 95.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 94.
Wednesday Night
Partly cloudy, with a low around 76.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Fairview Heights IL
 38.59°N 90.03°W (Elev. 499 ft)
Last Update:
11:37 am CDT Jun 20, 2025
Forecast Valid:
12pm CDT Jun 20, 2025-6pm CDT Jun 26, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation